adh-free water based binder for lasure coatings - eu ecolabel compliant · 2017-04-03 · adh-free...
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ADH-Free Water Based Binder for
Lasure Coatings - EU Ecolabel
Compliant
Massimo Longoni
European Coating Show 2017 Conference
03rd /04th April 2017 Nuremberg - Germany
AGENDA
EU Ecolabel, background and facts
Why adipic acid dihydrazide (ADH)?
New development → 1-to-1 substitution
Comparative study → lasure formulations
Summary
EU Ecolabel scheme Voluntary award
Introduced in 1982 (Regulation (EC) 1980/2000) - Implemented in 2009
(Regulation (EC) 66/2010)
> 44000 products & services involved (Sep. 2015)
Paints & varnishes category - Commission Decision 2014/312/EU - counts
10% ca. of total number of awards (Sep. 2015)
Key points: Voluntary
Focus on environmental impact (hazardous content) and
life cycle (durability)
Visual label for consumers
AGENDA
EU Ecolabel, background and facts
Why adipic acid dihydrazide (ADH)?
New development → 1-to-1 substitution
Comparative study → lasure formulations
Summary
Why is ADH used in water based binders? Room temperature curing
Polymers designed with Tg =
0-20 °C
Good film formation but,
Leads to blocking
Low water resistance
Solution: Post cure films
Preferably with 1K system
Crosslinking mechanism Room temperature curing
Reference: http://www.khneochem.co.jp/en/rd/technology/daam/
ADH is hazardous to the environment New crosslink solutions are needed
Chronic category 2 – hazard statement H411
Ecolabel threatened
On March 16, 2016 the commission has derogated
ADH since no alternative is feasible
Up to 1% ADH can be used
AGENDA
EU Ecolabel, background and facts
Why adipic acid dihydrazide (ADH)?
New development → 1-to-1 substitution
Comparative study → lasure formulations
Summary
Development aim 1-to-1 substitution of ADH containing binder
1K crosslinkable binder
Two phase polymer, optimized monomer
composition
Comparable properties to ADH in respect to:
Block resistance
Water resistance
0 VOC – improve vs standard
All screening tests done on binder
with and without solvent
New Acrylic Polymer Multiple options
Cross-linker
Comm ADH √ (ADH)
Std ADH √ (ADH)
Std ADH-free ×
ML-745 √
ML-745-A √
ML-747 √
New AC → no coalescing agent required
AGENDA
EU Ecolabel, background and facts
Why adipic acid dihydrazide (ADH)?
New development → 1-to-1 substitution
Comparative study → lasure formulations
Summary
Comparative study Lasure formulation
Low VOC (possible to formulate 0
VOC)
Low solids (23%)
Test vs commercial lasures: Ref.
A, Ref. B (glossy, low solids –
23/24%)
Compare: block resistance,
adhesion, weathering resistance
and gloss retention in accelerated
test and natural exposure
ML-19-E ML-39-D
ML-745 50
ML-747 50
Defoamer 0.40 0.40
Deareator 0.50 0.50
Substrate wetting agent 0.20 0.20
Neutralising agent 0.10 0.10
Texanol 1.00 1.00
UV absorber 1.00 1.00
Water 45.40 45.40
Slip agent 0.20 0.20
In-can preservative 0.10 0.10
Pseudoplastic HEUR thickener 0.40 0.40
Newtonia HEUR thickener 0.70 0.70
100 100
Block Resistance Room and high temperature
ML-19-E Ref. A
Ref. A Ref. B ML-19-E ML-39-D
5A 5B 5A 5A
Ref. A Ref. B ML-19-E ML-39-D
5A 5A 5A 5A
Block pressure - (1kg * 1 cm2)
1 hour @ 50°C
24 hours @ RT
Block pressure - (1kg * 1 cm2)
Optimal block and hot block resistance
Adhesion Dry and wet
Dry Adhesion Wet Adhesion
Ref. A GT 0 GT 0
Ref. B GT 0 GT 2
ML-19-E GT 0 GT 0
ML-39-D GT 0 GT 0
Perfect adhesion!
QUV A Gloss retention Comparable performance to ADH/polymers
Top gloss retention
Natural exposure Good shape after one year on a test fence
ML-19-E ML-39-D Ref. A Ref. B
No failure, delamination, flanking or cracking!
Natural exposure One year gloss retention equal to std. lasures
Gloss
retention
Ref. A 58.6%
Ref. B 62.8%
ML-19-E 61.0%
ML-39-D 64.1%
Natural exposure Discoloration
DL Db DE
Ref. A 4.68 6.85 8.37
Ref. B 1.05 4.29 4.61
ML-19-E 0.30 3.78 3.97
ML-39-D 1.04 4.32 5.23
Full comparison Complete picture
Legenda 0 → 5
Hot block 1 to 5
RT block 1 to 5
Gloss retention <50% to >80%
Water resistance 1 to 5
Dry Adhesion GT5 to GT0
Wet Adhesion GT5 to GT0
ML-19-E and ML-39-D good as commercial lasures or,
even, better
AGENDA
EU Ecolabel, background and facts
Why adipic acid dihydrazide (ADH)?
New development → 1-to-1 substitution
Comparative study → lasure formulations
Summary
Summary
Lasure formulations ML-19-E and ML-39-D equal or outperform
commercial standards
ML-745 and ML-747, both ADH-free, are suitable for Architectural
exterior wood segment (varnish and lasure)
Cross-linkable two-phase polymers ADH-free
ML-745 and ML-747 are Ecolabel compliant binder without the hazard
statement H411
No trade-off between life span and environmental impact
Acknowledgements R&D synthesis work
Dr. Andrew Hearley$ – EPS B.V. (Engineered Polymer Solutions)
Emile Stevens – EPS B.V. (Engineered Polymer Solutions)
Ibrahim Kemikkiran – EPS B.V. (Engineered Polymer Solutions) $ - Dr. Hearley moved to The Valspar Corporation
Massimo Longoni – EPS B.V. (Engineered Polymer Solutions)
or Visit us at European Coating Show 2017 - Hall 7, Stand 356N
Do you have questions? Contact me …